Here you can find background information on the key aspects of endurance sports nutrition.  The most important topics are fueling with carbohydrates and hydrating properly (along with measuring sweat rate to allow CORE to determine what "proper" is for you).  There's also info on caffeine, which is the best legal performance enhancing drug.  For those of you wrestling with gastrointestinal issues (GI), there's also reference material on the causes of GI issues and solutions.